Here Mudassar Ahmed Khan has explained with an example, how to display Image based on condition in GridView in ASP.Net using C# and VB.Net.

The ImageUrl property of the Image control is set with an Inline Expression which compares the value of the column and based on the value, the respective Image URL is returned which is used to conditionally display the Image in GridView.

Here Mudassar Ahmed Khan has explained with an example, how to get BoundField and TemplateField column values on Button Click in ASP.Net GridView using C# and VB.Net.

When the Button is clicked, the Selected GridView Row is referenced and then the values of the BoundField and TemplateField columns are extracted from it in ASP.Net using C# and VB.Net.

Here Mudassar Ahmed Khan has explained with an example, how to avoid (Prevent) Page refresh (reload) after SelectedIndexChanged is fired in ASP.Net DropDownList using C# and VB.Net.

The only possible way is to place the DropDownList inside ASP.Net AJAX UpdatePanel so that, instead of Full PostBack which causes Page refresh (reload), a Partial PostBack will occur.

Here Mudassar Ahmed Khan has explained with an example, how to get Selected Value from DropDownList in GridView in ASP.Net using C# and VB.Net.

The DropDownList inside GridView will be assigned with an OnSelectedIndexChanged event handler and when an Item is selected in the DropDownList, the Selected Value is displayed using JavaScript Alert Message Box.